package cn.lzk._04_delay;

import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyContext;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyStatus;
import org.apache.rocketmq.client.consumer.listener.MessageListenerConcurrently;
import org.apache.rocketmq.common.message.MessageExt;

import java.nio.charset.StandardCharsets;
import java.util.Date;
import java.util.List;

public class Consumer {
    public static void main(String[] args) throws Exception {
        //1.创建消费者
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("delay_consumer");
        //2.设置nameserver地址
        consumer.setNamesrvAddr("localhost:9876");
        //3.订阅消息
        consumer.subscribe("delay","hello");
        //4.注册消息监听器
        consumer.registerMessageListener(new MessageListenerConcurrently() {
            @Override
            public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> list, ConsumeConcurrentlyContext consumeConcurrentlyContext) {
                for (MessageExt messageExt : list) {
                    System.out.println(new Date().toLocaleString());
                    System.out.println(new String(messageExt.getBody(), StandardCharsets.UTF_8));
                }
                //如果失败，会继续发送消息
                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
            }
        });
        //5.启动消费者
        consumer.start();

    }
}
